#include<bits/stdc++.h>
 using namespace std;
 double s=0.0;
 int main(){
 	int x,y,z,i=0.0;
 	cin>>x>>y;
	 cin>>z;
	 i=x+y+z; 
	 s=i/3;
	 cout<<fixed<<setprecision(1)<<i<<' '<<s; 
 }
/**************************************************************
	Problem: 1602
	User: huxuanchen
	Language: C++
	Result: Wrong Answer
****************************************************************/